引言:乙型肝炎感染是世界性的公共卫生问题。全世界约5%的人受乙型肝炎病毒慢性感染,在某些国家,这一数字达10～20%。在美国,疾病管理中心(CDC)估计现在每年有200000人感染,其中6～10%将成为乙型肝炎病毒的慢性携带者。新疫苗:预防乙型病毒性肝炎的方法有二种。一种是被动免疫,给接触过乙型肝炎的个体注射乙型肝炎免疫球蛋白,这种免疫球蛋白制剂含高效价抗乙型肝炎的抗体,提供快速保护作用。本法的不足之处是保护作用不完全和不持久,须每月重复注射才能保持 Introduction: Hepatitis B infection is a worldwide public health issue. About 5% of the world’s people are chronically infected with Hepatitis B virus, and in some countries this figure is 10-20%. In the United States, the Centers for Disease Control and Prevention (CDC) estimates that 200,000 people are now infected each year, of which 6 to 10% will become chronic carriers of the hepatitis B virus. New Vaccine: There are two ways to prevent hepatitis B virus. One is passive immunization, in which individuals exposed to hepatitis B are injected with hepatitis B immunoglobulin, an immunoglobulin preparation containing a high titer of anti-hepatitis B antibody to provide rapid protection. The inadequacies of this law are the incomplete and non-sustained protective effects that need to be repeated on a monthly basis to maintain